This is a vintage Walnutta Hair Stain bottle embossed with the name at the base of the neck.   The amber -light brown bottle is  cork topped with a tooled finish. (Cork is missing.) The company also used an alternative spelling with double Vs, VValnutta and the names are difficult to differentiate.  As Walnutta was produce for the US market, I would think the letter on this one is a "W".  Howard Nichols of St Louis began producing Walnutta in 1901, and it was trademarked in 1906.  The hair stain was reported for quackery in 1921 and found to contain copper and iron.  Turn of the Century advertising promoted the stain to color over gray or enhance streaked, bleached hair, beards, mustaches, eyebrows and eyelashes.  (Making it a form of mascara as well as hair dye).  Later versions of Walnutta's bottle were screw top, indicating this is likely an early version, circa 1901-1910s.  My father, an avid bottle digger, found the old dye bottle more than 40 years ago in the ruins of an old homestead in Virginia.  It is in nice shape for a dug bottle, free of chips or cracks with the exception of a small chip on the lower lip.  There are a few air pockets in the glass along with some light sediment deposit.  The small antique bottle is about 4.25" tall and 1.5" wide).

For more information:

http://www.hairraisingstories.com/Products/WALNUTTA.html

https://www.periodpaper.com/products/1904-ad-walnutta-hair-stain-color-dye-pacific-trading-original-advertising-006353-old3-040

https://sha.org/bottle/finishes.htm